So i bought a ak thinking the ammo would be cheaper but my friend told me he is buying 223 american eagle ammo for 5 bucks a box at walmart. I buy tula ak ammo for 5 bucks a box. I know its steel case but my ak doesn't care. So in the future is 223 and 7.62x39 ammo going to cost the same as far as the cheapest ammo goes? Or is 7.62x39 going to be cheaper?

If the cheapest stuff you can find is the same as the cheapest ak ammo i may get a ar 15